Clamp for electric wires



(No Model.)

J. J. GREEN &'G.-C. BROWN.

CLAMP FOR ELEGTRIG WIRES. 4

No. 464,770. Patented Dec. 8,1891.

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UNITED STATES JOHN JAY GREEN, OF BOONTON, AND GEORGE O. BROWN, OF ELIZABETH,

NEV JERSEY. l

CLAMP FOR ELECTRIC WIRES.

SPECIFICATION forming part of Letters Patent No. 464,770, dated December 8, 1891.

Application led October 30, 1890. Serial No. 369,774. (No model.)

To all whom it may concern: B, as the latter lies in the groove b2 in the Be it known that we, JOHN' JAY GREEN, of manner hereinafter described.

Boonton,in the county of Morris, and GEORGE C is a central pivot, which may be a com- O. BROWN, of Elizabeth,inthecounty of Union, mon wood-screw, preferably with a tapering 5 State of New Jersey, citizens of the United slotted head, which passes through a central 5 5 States, have invented certain new and useful opening formed in the base A and somewhat Improvements in Clamps for Electric lVires, loosely through a similar opening in the cap of which the following is a specification. B, as best seen in Figs. 2, 5, and'G. The cap The object of our invention is to furnish a B (see Figs. 2, 5, and is formed with a o device for supporting, clamping, and holding sleeve b4, which enters a socket a. Trans- 6o electric conductors, particularly such converse corrugations b3 are formed in the botductors as are provided with an'outer sheath tom of the groove b2, which receives the wireJ vor covering of fibrous, textile, or compressi- D. The central pivot-screw C is adjustable ble material. in the direction of its length in the support 5 In the accompanying drawings Figurel is a E, upon which the base A is designed to be 65 plan view, partly in horizontal transverse secsecured, and should be adj usted,as in Fig. 5. tion, of one form of clamping device embodyin the first instance, so as to permit the cap ingour inventi'on. Fig. 2 is an elevation of the B to be raised toa height barely sufficient to same, partly in vertical transverse section. permit the wire D to be placed in the groove o Fig. 3 is a cross-section taken in the plane of b2 of the base. The cap B is rotated upon the 7o the line 3 3 in Fig. l. Fig. 4 isa cross-section pivot G in the direction indicated Vloy the artaken in the plane of the line 4 et in Fig. 1. rows, the result of' which 4is to slightly raise Fig. 5 is a cross-section showing the device that edge of the cap B which is directly above when adjusted in readiness for the insertion the inclined surface b of the base A, and

5 of the wire or line to be clamped, and Fig. 6 thus' by making use of the central screw C as 75 illustrates the operation of clamping the wire. a fulcrum to bring the opposite horizontal vThe invention is applicable either to insubearing-surface a2 of the cap forcibly in conlating-supports, in which case itis preferably tact with the Wire D, pressing the slightlymade of glass, porcelain, or other like nonyielding surface of the same against the coro conducting material, or to conducting-suprugations ha, after which the pivot or screwC 8o ports, such as the clamping terminals of elecmay, if necessary, be `driven home or longitric switches and the like, in which case it tudinally adj usted, thereby causing the wire may be constructed of brass or other equiva- D to be iirmly held and prevented from movlent conducting metal. ing eitherina longitudinal or a lateral direc- 5 Referring to the separate figures of the tion. lrVhen a thick wire is to be clamped, it 85 drawings, A is the base or stationary portion is especially important that the cap B should of the device, which in the present instance not t too closely around the pin C, as the opis provided with two wire supports, as shown, eration of the device ismore effective when each of which has an inclined bearing-sursufiici'ent play is permitted. By rotating the o face b', forming, as it were, a portion of a cap Bin the reverse direction, and, if neces- 9o screw thread, and a shallow semicircular sary, by loosening the screw C, the wire may groove b2, adapted to receive the wire and. prebe removed at will. When the base-piece A vent it from becoming laterally displaced. is of insulating material, a shallow annular Above the base is a rotatable cap B, which'is groove b is formed in its under side, which 5 likewise formed with an inclined bearing-surtends to prevent the space between the base- 9 5 face a opposite to and corresponding with piece A and its support from becoming filled that at b upon the base, hereinbefore referred With water.

to. The cap B is also provided with a hori- XVe claim as our invention-n zontal bearing-surfaceaz, which is adapted to l. ln a wire-clamp, the combination of a o press upon opposite sides of the wire or line base having an inclined bearingsurface, a ro- Ico tatable cap having a similar and opposed inclined surface and loosely encircling a eentral pin capable of longitudinal adjustment,

and a groove for receiving' the wire, substan- 5 tially as set forth.

2. In a wire-ola1np, the combination, with a Common base, of two inclined bearing-surfaces and two caps, eaoh capable ol' independ ent vertical and rotatable adjustment upon to loosely-fitting central pins for grasping two parallel wires, as set forth.

3. In a wire-Clamp, the Combination of the base having an inclined bearing-surface, the rotatable cap having a similar and opposite- 15 ly-inelined surface and loosely encircling a longitudinally-adjustable central pin, and a sleeve formed upon one of said parts, surrounding said pin and turning within asooket formed in the other part, substantially asset forth. 2o

In testimony whereof we have hereunto subscribed our names this 25th day of October, A. D. 1890.

JOHN JAY GREEN. GEORGE C. BROVN.

Witnesses as to John J'. Green:

JAMES H. DEPOE, FRANKLIN L. POPE. wWitnesses as to George C. Brown:

l. J. RYAN, FRNKLIN L. Porn. 

